Diagnostic testing has revealed a deficiency in the function of a patient's complement system. This patient is likely to have an impaired ability to do which of the following?
A) Protecting the body against viral infection
B) Marking the parameters of the immune response
C) Bridging natural and acquired immunity
D) Collecting immune complexes during inflammation
Ans: C
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Complement has three major physiologic functions: defending the body against bacterial infection, bridging natural and acquired immunity, and disposing of immune complexes and the byproducts associated with inflammation. Complement does not mark the parameters of the immune response; complement does not collect immune complexes during inflammation.
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